CVE-2018-6343 : Security Advisory and Response

Proxygen fails to properly validate the establishment of a secondary authentication manager, leading to a denial of service vulnerability when processing specific HTTP2 Frames over a TLS 1.3 transport. This impacts versions from v2018.10.29.00 to v2018.11.19.00.

Understanding CVE-2018-6343

This CVE involves a NULL Pointer Dereference vulnerability in Proxygen, affecting versions within a specific range.

What is CVE-2018-6343?

CVE-2018-6343 is a security vulnerability in Proxygen that arises from inadequate verification of a secondary authentication manager, potentially resulting in a denial of service threat.

The Impact of CVE-2018-6343

The vulnerability in Proxygen versions v2018.10.29.00 to v2018.11.19.00 can lead to a denial of service scenario when processing certain HTTP2 Frames over a TLS 1.3 transport.

Technical Details of CVE-2018-6343

Proxygen's vulnerability and its implications are detailed below.

Vulnerability Description

Proxygen fails to validate the presence of a secondary authentication manager before accessing it, creating a security gap that can be exploited for denial of service attacks.

Affected Systems and Versions

Product: Proxygen
Vendor: Facebook
Affected Versions: v2018.10.29.00 to v2018.11.19.00

Exploitation Mechanism

The vulnerability can be exploited by analyzing a Certificate/CertificateRequest HTTP2 Frame over a fizz (TLS 1.3) transport, triggering a denial of service condition.

Mitigation and Prevention

Protecting systems from CVE-2018-6343 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update Proxygen to a patched version that addresses the vulnerability.
Monitor network traffic for any suspicious activities that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Implement secure coding practices to prevent similar vulnerabilities in the future.
Regularly audit and update authentication mechanisms to enhance system security.

Patching and Updates

Apply the official patch provided by Facebook for Proxygen to mitigate the CVE-2018-6343 vulnerability.